DefinePK

Abstract

Rain has deleterious impact on satellite signal propagation above Ku-band due to scattering and absorption. Numerous Empirical and Non-empirical models are evolved based on measured statistics to estimate the rain attenuation. The day wise, monthly and yearly analysis for 3 years of data is performed in Vaddeswaram. Of the available models, for the tropical region, ITU-R model which uses bulk recorded database clearly underestimates the value. In this paper different attenuation models like ITU-R, RH, SAM and Moupfouma are studied and the results are compared with measured values and analyzed to determine the suitable model for one of the tropical region Vaddeswaram, A.P. It is observed that the average attenuation is around 13.5dB in a year and Moupfouma model is best suited for this region.